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Thread: Deferred messages from Mailer-Daemon

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  1. #1
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    Default Deferred messages from Mailer-Daemon

    I get a ton of messages in my deferred queue with a sender address of Mailer-Daemon. I looked up some of the receiver addresses in the logs because they looked fishy and all of the addresses are from spam sent to accounts that don't exist on our server. As far as I can tell Zimbra is trying to bounce these messages back and they're getting stuck in the deferred queue when the sending address doesn't resolve. Are my assumptions correct, and if so how can I set Zimbra to just dump mails to nonexistant addresses instead of trying to bounce them?

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
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    In zmmta.cf change the setting for "smtpd_reject_unlisted_recipient'" to yes save the config and restart postfix. You'll need to change this setting on each upgrade as it isn't preserved.
    Last edited by phoenix; 08-13-2007 at 10:30 AM.
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    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
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    Ok, tried that but it doesn't seem to be doing anything.
    We used to relay our outbound mail through our ISP (the IP block they gave us was on a few RBLs), after much wailing and gnashing of teeth we finally got a new (clean) ip block so we recently switched to sending directly from Zimbra, is there maybe a setting that needs to be changed back to keep Zimbra from accepting mail to non-existent accounts?

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    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by jpcaldwell View Post
    ......, is there maybe a setting that needs to be changed back to keep Zimbra from accepting mail to non-existent accounts?
    I've already given you the setting for that, you should see messages in the logs for those non-existent addresses being rejected. That setting does work and I use it on my own server. Do you, by any chance, have any catch-all address set on your Zimbra server?
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    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  5. #5
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    I set smtpd_reject_unlisted_recipient to yes, restarted Zimbra, and confirmed it was set with postconf, but haven't seen a change. I don't believe there is a catchall (I'm sure I didn't set it), where would I look to check that?

  6. #6
    phoenix is offline Zimbra Consultant & Moderator
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    If you didn't set a catch-all address then it's not set by default. Do the logs show any messages for the rejected addresses?
    Last edited by phoenix; 08-13-2007 at 10:18 AM.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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